Dijit.tree - 如何更新商店网址

Question

我的HTML文件中有以下内容：

<div dojoType='dojox.data.XmlStore' id='navTreeStore' jsId='navTreeStore' url='' label='name'></div>
<div dojoType='dijit.tree.ForestStoreModel' jsId='navTreeModel' store='navTreeStore' query='{}' rootId='NavTree' rootLabel='NavTree' childrenAttrs='childNodes'></div>
<div dojoType='dijit.Tree' id='navTree' model='navTreeModel'></div>

我希望能够动态地更改商店的URL。我似乎无法通过以下方式实现这一目标：

var tree = dijit.byId（'navTree'）;

tree.model.store.url = urlAddress;   //new URL
tree.model.store.clearOnClose = true;
tree.model.store.close();
tree.model.store.fetch();

我错过了什么？